keach: archaeologist william sanders has been leading excavations in the copan valley since 1980. sanders: we decided to do a series of large-scale excavations out in the countryside to get an idea what the farming population was like. what kind of houses did they live in ? what was their lifestyle like ? probably 80% of the population of copan was in that social category. keach: unlike ceren, the ancient houses of copan had been exposed to centuries of erosion. very few artifacts remained intact or in their original location. still the team finds significant clues. in one structure, the team discovers a razed platform of stone, the remnants of a sleeping bench. in another, they find evidence for a kitchen -- shattered obsidian blades that once were knives and broken pieces of pottery that were once used for cooking. the layout of ancient maya houses is quite different from our own. the maya constructed separate buildings for sleeping, cooking and storing food. they organized these buildings around patios. after two seasons of work up here, what can we say ? we have almost fully e